Department of Medical Informatics and Biostatitics

Faculty of Medicine, Iuliu Hațieganu University of Medicine and Pharmacy, Cluj-Napoca, România

Practical Activity 05: Descriptive statistics for quantitative variable

Educational objectives

At the end of this practical work, the student will be able to:

  • Calculate the parameters of centrality (arithmetic mean, median, modulus, central value), dispersion (range, standard deviation, coefficient of variation) and localization (quartiles 1 and 3, minimum, maximum), asymmetry (asymmetry and kurtosis).
  • Know and apply predefined Excel functions for calculating the parameters of centrality (AVERAGE, MEDIAN, MODE), dispersion (STDEV.S, VAR.S), asymmetry (SKEW, KURT), and localization (MIN, MAX, QUARTILE.INC).
  • Know and apply user-defined functions for range, center value, and coefficient of variation.
  • To interpret parameters of centrality, dispersion, asymmetry, and localization.
  • To make appropriate graphical representations for evaluating the distribution of a quantitative variable (histogram or box with whiskers), the relationship between a quantitative variable and a qualitative one (box with whiskers), and the relationship between two quantitative variables (point cloud graph).
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